This 45-degree elbow is a class 125 brass pipe fitting with female National Pipe Taper (NPT) threads on both ends to connect and change the flow direction between two male pipes. The elbow has NPT threads for creating tighter seals than straight threads. It is made of brass, which has greater corrosion resistance than steel, and the material’s relative softness allows for easy installation. The pressure ratings for this class 125 elbow are 125 pounds per square inch (psi) for steam and 200 psi for water, oil, and gas (WOG), and the fitting meets standards ANSI B 1.20.1 and ANSI B 16.15 for quality assurance. Class is a standard relating to tolerance, construction, dimension, and wall thickness, but it is not a direct measurement of maximum working pressure.Pipe fittings are components used for connecting, terminating, controlling flow, and changing the direction of piping in many different industries. When purchasing pipe fittings, consider the application, as this will affect material type, shape, size and required durability. Fittings are available threaded or unthreaded, in many shapes, styles, sizes, and schedules (pipe wall thickness).